Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9de649b12d9e09c487c3d9ba66182c80d46d79eeefb0c109231f7f0626364620' 
  AND token = 'AqXFTVOffWvuI2bK7KucecvMWTkwq+Ol1pOOU8uvur0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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