Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aeb689823515872c139b4d474f1f44e85ee8d5e7312134841d2ede8b18a0b47' 
  AND token = 'MOPoD7mmW3/J9b28AvF9Q3lsbOPJq59s17d+G9bEbUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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