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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd854e64c069702ea6aa380a6309036f4d0691850ff85ede3e54e58711c85d77' 
  AND token = 'USyR9jEw6L0LLs61qxfpIFGVpEmzbThFI22nnkUHdjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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