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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee05f8f153375f1e413cf43d1ec4b7aecf93ecc4e3e9d669f2d1375871905c9' 
  AND token = 'Ole6ncxIgt20UMqhf5aQmsQ+XG/EgvzrwLrYhH976m4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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