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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6aa5e96471e41b46f25957cc6bd9a7c2b9f463e42ea4f3c0f7c4cf3115c10c5e' 
  AND token = '3J4SIVCa6yArfhhOd9BhprS8uqMbGC/EL9QvH8g9Yos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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