Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'da63d15cd06458ea98836fe0e0c204e51fda0543c76ad887d398b6653a55ecc8' 
  AND token = 'oJA1cTNDi4olrxJletUTxLjZpsrJse4gwlprqZ/18N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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