Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '060ace5fafbcd5c5a0cff30464ae7ab44c794365a572b8fad416570b911a6aa9' 
  AND token = 'dEoL4ISQHPFdcGtTgLcysTJZshVS46rM96aTX7ATrgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}