Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6571c7844b943ba30ea4055bddaa9900fe06ef660081f0d11cd062ea4499c03c' 
  AND token = 'j0a0Cb3WJGud3UrZSn5MTUYYcRuVuEE7R5mL0Hrmm1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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