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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e7edbde5efed7e2c5f93f98383334cf76044bc88a8e2d18b515e878f49d88c3' 
  AND token = 'ZuBeZVQnzqsqGSU6xtp5dz5PdVfZoOX43/ihdJo0PUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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