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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '2ce4e5777bf6dcde0af72b9dd50747ddfb61255c11f21feaa510f6cc2d0cd5ac' 
  AND token = 'HjG8JiBmXT/lIh9wesmDh/fJlqAehH+Lx92ro4723oY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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