SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24397950b1c60667872ec9e87e7a103ba95a5763072a2736b454af5230426ffd' 
  AND token = 'tYZNfLpnhIprTkzFtDy+lqiubrzlL4J/981QZ67kEzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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