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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d095eb9a48a4160e53efca4c497f94cd70c5ba0fc7d96bbd34b1ce16cb42212' 
  AND token = 'WcJzF/w1596R9H+iwatGIRnPSc6rSWJsjk6dnnDLfPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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