Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '995566627e969ce9f3f8bb00e6284438d4f2d61988ff34100904048400942c3b' 
  AND token = 'VwZVVG71K6G50lk0hSolLyy5wrzxtyrWUY9rQENWjwo=' 
  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"
    }
  }
}