SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '267cb819d3b524e2750252b5332c0385dfc85ec922e437555f99fcc96d3f004d' 
  AND token = 'kp1VwIBiXP9ZgFUw5tWj8vAIjlDilryOQD2dGzKGD98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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