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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1d81a9edf1d878e5d0c4f580d75f0369d704d537939625e0a838864e2d65f7b' 
  AND token = '1SKFfS5EHVjMG2Xd4zk/YXTN1fqYsriSNyWAK2d8TLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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