Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e295a6ec892dd271a73acaa4f14ec6f814bceeacfb6b45d9585c0e1d79b89a1f' 
  AND token = 'iHZ/GS365GTPOiCNqB4PeIxOHyoc0M3p4cQj5afpijk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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