Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eff76fb5b345d67f04c9092a6ded0253596bb2a536771244d65ce074e1cd3694' 
  AND token = 'pvsAu/ErWaq9Enpyl4Fv6O4UIu0yQ31atEbqULHDRrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}