Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804d4fa4b75a61f16d98ebd554445db0efeac1773e0af1a9d4e1bc625d054bee' 
  AND token = 'I7pV/6TbeexyrVbiMZoR6jiiUbrFn9WjRtancPiD1Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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