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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bdd2a3e4209801abaf7fc2ce03ee62f43c2d95c09f91563ba5f82da5ff18998' 
  AND token = '9tUmahWf9Ms0GMo5Mwz3Wo/QmpWExmluZcMXFKYHsWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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