Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a96ade3266a7714f9515fceb07bb987da342ea3afac4f13ab7da66a490eff0' 
  AND token = 'ofq4gr+KwOx3492qvLejr0qAeSgk1quhpCPVpOSSqSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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