Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b64a2a9755ca960eef79a17a23fe14050e63034bcd7e4274753d777b29e5f60b' 
  AND token = 'pmEnHTrB12t0y5addHotCVRTe/brC/0oOrFPd2jpb5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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