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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eabb23ab130fc129f71dab8d8545e499cf0f7a92df5a71aa9cc4eef8db3d58c9' 
  AND token = 'm/a+9Fgufxe/vCpgpnCq6SX5O3uTnAmB7AmBtljeDB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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