Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '203c7bf1e15c22d16e56b45205f950c22546aa575f42928232d6c047e60bd7bc' 
  AND token = 'foBRu/4zCL9a71fO2THxTwNrNljfHrPxPpDM+K/r30M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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