Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6fa65f79a43fb26b8fc343a7f44dd983605729d88fb528112084556d1d3bc4e' 
  AND token = 'e2msBrfYcioXHY6zy6Ib+DBCVffsy5BFbjNuHm+wZN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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