SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f605ea487b35107637f67789c0807c0814875e9e032fae8fda3696d40202cf49' 
  AND token = 'qYziBpFvS2j7JlUI+r6o0pv7ws05mQovyB9ALUbVLz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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