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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee100d889f2bb9e3292a19be4933ea284e4c4aef9a073274304fa82273ca8cdd' 
  AND token = 'wFnoKk4obTXoWpnPwUP9Jza5dMW17dz2zBSViZ9H2pA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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