Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cfc157a927b5c44fc5f1a50233ee783a5ddc0875ec4e46cafae8207d502da56' 
  AND token = '+F+PNK+tupWbGB6fu4DSskinAtErXm6pk2rjBBSZ0NY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}