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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba307e2f6d3fcbfd89fced4863d5e13e00e6d25c8ca5b1f6a1787ddd16f47bf' 
  AND token = 'cVBe4tsmhxExiGtCfx3mx0Pzr5H+VF5zFpsT89jjNB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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