Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2aff22ed68950357ac72ce513e80de7d00d0f062f8ea975b6c04fc6a8cf2158' 
  AND token = 'dRtXy2Ef1wsXrpFUsaGEyTGMtHcIxyx5QpawsgtqTi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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