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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbede3975523de2c9f88201677a8fd8ffc17cc03de7ddd9bf4d5497c70ab0b9f' 
  AND token = 'U56PAzCKc0AynoAGp9wEgPRUqvOw2ALqKFrLitlnyb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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