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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17f125b8e94e3fe4a4d6ecc04f0d7e1b9307f9cc2c41013e5a7ae4c4ef6ce471' 
  AND token = 'y3xtF2P/JhtHLX1+aoeqNrbhuxw0tbC71DD6f7LF0ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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