Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7dd5694cdfaaa6f41cd4b9d6b373b619c2cfe46ab9f1428c8f9a102c527286cc' 
  AND token = '+WyIUXPYvN8yEaQSP23hV3SgGhYuM3D40dTvbJlgy98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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