Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad2205046758254799dd8f6e2661c5732edaae3601c7a2799944737ee841bec' 
  AND token = 'iK+a9OMEg1/KtZ2fAvPvKFaCgNSRI/LPgLelpvJzwfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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