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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d85279e8fbdb28d9253fd76955bd96df56f55ae632562613ed5b4d8a8c50e10' 
  AND token = '9gMNlZsNRm8GALQ4J2GMT5DkPWCtpo5aERtvo+kwWvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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