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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab1e6090e320bf54eb3b4e5f709ad7e09dfc033f3449d07fc1307696cacb6669' 
  AND token = 'tMfvk5CikTO2b85PuF7cqM7jrDjWjwgfIK/pu1bEods=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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