Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2373c86484d4c5accbe10bfadcd7411df3f044e7273080a85f15bd128ae44265' 
  AND token = 'L0Crl/VTUxWWKIT1JOuplVPl3om+WIqwEdWEBI8zurk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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