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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d35e61fed496cbf8a663cda537330d9b47bddf331d6fd27ac42f39c2ebf914b' 
  AND token = 'sSwLd7jnzqQ8J4o2XQvYiTYwEwZArwZB0JblL6NCcS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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