SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '3def583457710308d60749227ac94c5b3ad2956f272610d27d16d35fdb5ba65d' 
  AND token = 'OwNhGxX0M/JljogQ7Wx0J5p0VSKVOgHYUzYUT4+fUMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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