Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a905673525bce832433e411bc3443f3df2ac6c52e61ab062b89e407ada2e1afb' 
  AND token = 'dG1w13hXR4wmS4YKDhr6j9FTlssVnS7JaBKEv4ozb7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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