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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b2d5a422450caaadd1fd09057ec7ddfd5126a11a45db82c77cba0c972f7eb7' 
  AND token = 'bh7q1t//1nV7o7aI5GONRrTzpH8Rn9TQurCRdUdbP7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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