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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90834a9eb33f08d86698f35dcc4415880fad55ac8c33038ccfb4f9a1c7c1339d' 
  AND token = '+sL6tX3H8ypvdfMbwyN2i1BzyH4MpHX3PKRGfkvBVTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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