Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b88ac3d3f6df409a879ec38fe8526852bbe7b5b2b1db41d87137dddf25be15c1' 
  AND token = 'H+tqPA5F0PZxnBHDeUoySNMqRHcmDdpCmQYYf1IqxsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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