Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b533faf93cfb3eb23713f0a8e741a64b1da2f35432fb6f1e4a42ea2bc42a725e' 
  AND token = 'qKc90qcnqXkq2NfohXNi2L/C4cMvJ7u4lQiMaeFuvwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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