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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52c04ac116d602548a40ce7961c0a8eef97a22953ec401401cc8bb83f2df41b9' 
  AND token = 'vy1yZ7xCv1gxjGcBG1nBIMpWahQtGW4J8Os0zwZYSUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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