Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a0c4cf9f4fb90ba31adf3af5afbbe8623c1990698861b8996732bda14c77e6' 
  AND token = 'mwJvl4Eews/NKX7yIn+oHb8DsHP9FHvS7uzHAHR356c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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