Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a00ac73726213fdde1f4797be305e8ab259520308334b05ca1b41a1d6f33ef22' 
  AND token = 'Y/RvQ3r4LZ2cUKZ6Ya/DSQ1yZW4BqxB0Bb7xzsyd8gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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