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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '689115dee050a677ab52579a8c70c84d6a97ea3eac41c663c067fb1cdf5f4a11' 
  AND token = 'Lv5cBjnO/LLMJzwCkSs1ECo7d8EROjtj9GiCbA93LaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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