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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fbe6761b794e066fa95a7cc0db0e59fd18f48360510c7ac33c2ee3eea2a8e347' 
  AND token = 'euClMKF1WP8y1gCUHq0ZWO4k4E/ksVUf6bvkX5fDY7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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