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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f0aab07ca3ae07b5814a6774e8dbf0085d1696f4e6e5c3394a948b12aab52db' 
  AND token = 'GLZuyhwx00buBKP7rEMVeKnOcnTlFTHYWcF104WlOHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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