Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37ec65c92debd5a1c10388a7be20f7a5c97427976951011bf32b8be31bbf8d2a' 
  AND token = 'LOIb7MVkeTePt4uWoJElDfDd7H715tTXLiepqZe49X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}