Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26f8c1253fb40781ba4cf0302a3a45d3d62f31b7d4800957ac719573c7265725' 
  AND token = 'deYjC08WrAUx8fUeMLb8TCBTDD7pia5pu2fcqXReqtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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