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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '00a31a64b006acab1ec3e5df3007d1ff6fa5dac58f51875e6fea2811dbc4d5e9' 
  AND token = 'tomwafsQz6+EnvB0RSW6Z8JNfYD7BeBoTgpGnbQuML0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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