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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9a7382775d8ce039e85cb41d8d3c4eda5d5f4e0a6ce5fd782bc5659f432e0bb' 
  AND token = 'XZoR/qE1ahme0yJtkK8SA5jJD/vlovhM82t4g6FNL0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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