Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fce19660b17600f5a85f8d7d3b33b625749218f7b9271e20563d8589d9b61e1' 
  AND token = '+mExA6xDox4DNMNarlx05NqJroPHiMZvWSddL7dY7uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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