Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d6b82bd51cda8b71a17a993534094815c1f1c3884b6508ab76ad00e14394b00' 
  AND token = 'IoyZ+KViQ3GsoGUI60h+0B0lGR4sfv2PFiirBXaN51o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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