Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7877de76a8ff9fb1d89aa8b4e46d1d3966c884da190a4f81249736968dbf995c' 
  AND token = 'X+FbyOeWJVcjT+Lhhb+/rpUHkGuFINm8MS7hwq47xRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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