Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '973296e32c093e3ec6942a4041f637600454eb1c535a3b2fd47fa66d530feb12' 
  AND token = 'vF2TaDJlpLmnGOSW9dQIUDl27NO0TfPXGiNzJUHICOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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