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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '236e32970299e0775c1f07dd022ed0a38c51b2026506b1527f990e201151404e' 
  AND token = 'xKEOXiMvI6jxGyLD9A230rFl3QvjcIQw5iBNYGRV+9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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