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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24fd0d793a5ac31b856b35d519c528edc9cd5737e37e81e014b4e8183b6215b7' 
  AND token = 'ESEfT1Vsp7hlc/JlguY0Ef7VfXbBvF7UGmX76DnX3CA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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