Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4bb28ed5bf62d85b3bdee299260f0728898185df921c68f2a6abae22c07a616' 
  AND token = 'm2lruRNByUSfTwd+6F/2EIm1P1mek/1UXeZBmqQPOlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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